| 摘要 |
PROBLEM TO BE SOLVED: To perform color conversion at high speed by performing arithmetic interpolation in parallel in the course of a color converting process which is performed by also using arithmetic interpolation for a lookup table. SOLUTION: The lattice point data corresponding to the maximum value, intermediate value, and minimum value of the low-order bit data of inputted color data indicating each term of an arithmetic interpolation formula and the relations among the values are respectively stored in prescribed registers 402, 404, and 406 are registers 403, 405, and 407. Consequently, the appearance of a condition branching process resulting from the magnitudious relation among the values in the succeeding sum of products operation (registers 408, 409, and 410) can be prevented. Therefore, parallel processing becomes possible, because interpolation can be made through one unitary operation.
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